/* ibmtr.c: A shared-memory IBM Token Ring 16/4 driver for linux * * Written 1993 by Mark Swanson and Peter De Schrijver. * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * * This device driver should work with Any IBM Token Ring Card that does * not use DMA. * * I used Donald Becker's (becker@scyld.com) device driver work * as a base for most of my initial work. * * Changes by Peter De Schrijver * (Peter.Deschrijver@linux.cc.kuleuven.ac.be) : * * + changed name to ibmtr.c in anticipation of other tr boards. * + changed reset code and adapter open code. * + added SAP open code. * + a first attempt to write interrupt, transmit and receive routines. * * Changes by David W. Morris (dwm@shell.portal.com) : * 941003 dwm: - Restructure tok_probe for multiple adapters, devices. * + Add comments, misc reorg for clarity. * + Flatten interrupt handler levels. * * Changes by Farzad Farid (farzy@zen.via.ecp.fr) * and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) : * + multi ring support clean up. * + RFC1042 compliance enhanced. * * Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) : * + bug correction in tr_tx * + removed redundant information display * + some code reworking * * Changes by Michel Lespinasse (walken@via.ecp.fr), * Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr) * (February 18, 1996) : * + modified shared memory and mmio access port the driver to * alpha platform (structure access -> readb/writeb) * * Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com) * (January 18 1996): * + swapped WWOR and WWCR in ibmtr.h * + moved some init code from tok_probe into trdev_init. The * PCMCIA code can call trdev_init to complete initializing * the driver. * + added -DPCMCIA to support PCMCIA * + detecting PCMCIA Card Removal in interrupt handler. If * ISRP is FF, then a PCMCIA card has been removed * 10/2000 Burt needed a new method to avoid crashing the OS * * Changes by Paul Norton (pnorton@cts.com) : * + restructured the READ.LOG logic to prevent the transmit SRB * from being rudely overwritten before the transmit cycle is * complete. (August 15 1996) * + completed multiple adapter support. (November 20 1996) * + implemented csum_partial_copy in tr_rx and increased receive * buffer size and count. Minor fixes. (March 15, 1997) * * Changes by Christopher Turcksin <wabbit@rtfc.demon.co.uk> * + Now compiles ok as a module again. * * Changes by Paul Norton (pnorton@ieee.org) : * + moved the header manipulation code in tr_tx and tr_rx to * net/802/tr.c. (July 12 1997) * + add retry and timeout on open if cable disconnected. (May 5 1998) * + lifted 2000 byte mtu limit. now depends on shared-RAM size. * May 25 1998) * + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998) * * Changes by Joel Sloan (jjs@c-me.com) : * + disable verbose debug messages by default - to enable verbose * debugging, edit the IBMTR_DEBUG_MESSAGES define below * * Changes by Mike Phillips <phillim@amtrak.com> : * + Added extra #ifdef's to work with new PCMCIA Token Ring Code. * The PCMCIA code now just sets up the card so it can be recognized * by ibmtr_probe. Also checks allocated memory vs. on-board memory * for correct figure to use. * * Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) : * + added spinlocks for SMP sanity (10 March 1999) * * Changes by Jochen Friedrich to enable RFC1469 Option 2 multicasting * i.e. using functional address C0 00 00 04 00 00 to transmit and * receive multicast packets. * * Changes by Mike Sullivan (based on original sram patch by Dave Grothe * to support windowing into on adapter shared ram. * i.e. Use LANAID to setup a PnP configuration with 16K RAM. Paging * will shift this 16K window over the entire available shared RAM. * * Changes by Peter De Schrijver (p2@mind.be) : * + fixed a problem with PCMCIA card removal * * Change by Mike Sullivan et al.: * + added turbo card support. No need to use lanaid to configure * the adapter into isa compatiblity mode. * * Changes by Burt Silverman to allow the computer to behave nicely when * a cable is pulled or not in place, or a PCMCIA card is removed hot. */ /* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value in the event that chatty debug messages are desired - jjs 12/30/98 */ #define IBMTR_DEBUG_MESSAGES 0 #include <linux/module.h> #ifdef PCMCIA /* required for ibmtr_cs.c to build */ #undef MODULE /* yes, really */ #undef ENABLE_PAGING #else #define ENABLE_PAGING 1 #endif /* changes the output format of driver initialization */ #define TR_VERBOSE 0 /* some 95 OS send many non UI frame; this allow removing the warning */ #define TR_FILTERNONUI 1 #include <linux/ioport.h> #include <linux/netdevice.h> #include <linux/ip.h> #include <linux/trdevice.h> #include <linux/ibmtr.h> #include <net/checksum.h> #include <asm/io.h> #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args) #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args) /* version and credits */ #ifndef PCMCIA static char version[] __devinitdata = "\nibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n" " v2.1.125 10/20/98 Paul Norton <pnorton@ieee.org>\n" " v2.2.0 12/30/98 Joel Sloan <jjs@c-me.com>\n" " v2.2.1 02/08/00 Mike Sullivan <sullivam@us.ibm.com>\n" " v2.2.2 07/27/00 Burt Silverman <burts@us.ibm.com>\n" " v2.4.0 03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n"; #endif /* this allows displaying full adapter information */ static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" }; static char pcchannelid[] __devinitdata = { 0x05, 0x00, 0x04, 0x09, 0x04, 0x03, 0x04, 0x0f, 0x03, 0x06, 0x03, 0x01, 0x03, 0x01, 0x03, 0x00, 0x03, 0x09, 0x03, 0x09, 0x03, 0x00, 0x02, 0x00 }; static char mcchannelid[] __devinitdata = { 0x04, 0x0d, 0x04, 0x01, 0x05, 0x02, 0x05, 0x03, 0x03, 0x06, 0x03, 0x03, 0x05, 0x08, 0x03, 0x04, 0x03, 0x05, 0x03, 0x01, 0x03, 0x08, 0x02, 0x00 }; static char __devinit *adapter_def(char type) { switch (type) { case 0xF: return "PC Adapter | PC Adapter II | Adapter/A"; case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)"; case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter"; case 0xC: return "Auto 16/4 Adapter"; default: return "adapter (unknown type)"; }; }; #define TRC_INIT 0x01 /* Trace initialization & PROBEs */ #define TRC_INITV 0x02 /* verbose init trace points */ static unsigned char ibmtr_debug_trace = 0; static int ibmtr_probe1(struct net_device *dev, int ioaddr); static unsigned char get_sram_size(struct tok_info *adapt_info); static int trdev_init(struct net_device *dev); static int tok_open(struct net_device *dev); static int tok_init_card(struct net_device *dev); static void tok_open_adapter(unsigned long dev_addr); static void open_sap(unsigned char type, struct net_device *dev); static void tok_set_multicast_list(struct net_device *dev); static int tok_send_packet(struct sk_buff *skb, struct net_device *dev); static int tok_close(struct net_device *dev); static irqreturn_t tok_interrupt(int irq, void *dev_id); static void initial_tok_int(struct net_device *dev); static void tr_tx(struct net_device *dev); static void tr_rx(struct net_device *dev); static void ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev); static void tok_rerun(unsigned long dev_addr); static void ibmtr_readlog(struct net_device *dev); static struct net_device_stats *tok_get_stats(struct net_device *dev); static int ibmtr_change_mtu(struct net_device *dev, int mtu); static void find_turbo_adapters(int *iolist); static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = { 0xa20, 0xa24, 0, 0, 0 }; static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0}; static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0}; static int __devinitdata turbo_searched = 0; #ifndef PCMCIA static __u32 ibmtr_mem_base __devinitdata = 0xd0000; #endif static void __devinit PrtChanID(char *pcid, short stride) { short i, j; for (i = 0, j = 0; i < 24; i++, j += stride) printk("%1x", ((int) pcid[j]) & 0x0f); printk("\n"); } static void __devinit HWPrtChanID(void __iomem *pcid, short stride) { short i, j; for (i = 0, j = 0; i < 24; i++, j += stride) printk("%1x", ((int) readb(pcid + j)) & 0x0f); printk("\n"); } /* We have to ioremap every checked address, because isa_readb is * going away. */ static void __devinit find_turbo_adapters(int *iolist) { int ram_addr; int index=0; void __iomem *chanid; int found_turbo=0; unsigned char *tchanid, ctemp; int i, j; unsigned long jif; void __iomem *ram_mapped ; if (turbo_searched == 1) return; turbo_searched=1; for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) { __u32 intf_tbl=0; found_turbo=1; ram_mapped = ioremap((u32)ram_addr,0x1fff) ; if (ram_mapped==NULL) continue ; chanid=(CHANNEL_ID + ram_mapped); tchanid=pcchannelid; ctemp=readb(chanid) & 0x0f; if (ctemp != *tchanid) continue; for (i=2,j=1; i<=46; i=i+2,j++) { if ((readb(chanid+i) & 0x0f) != tchanid[j]){ found_turbo=0; break; } } if (!found_turbo) continue; writeb(0x90, ram_mapped+0x1E01); for(i=2; i<0x0f; i++) { writeb(0x00, ram_mapped+0x1E01+i); } writeb(0x00, ram_mapped+0x1E01); for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif);); intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN)); if (intf_tbl) { #if IBMTR_DEBUG_MESSAGES printk("ibmtr::find_turbo_adapters, Turbo found at " "ram_addr %x\n",ram_addr); printk("ibmtr::find_turbo_adapters, interface_table "); for(i=0; i<6; i++) { printk("%x:",readb(ram_addr+intf_tbl+i)); } printk("\n"); #endif turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4)); turbo_irq[index]=readb(ram_mapped+intf_tbl+3); outb(0, turbo_io[index] + ADAPTRESET); for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif);); outb(0, turbo_io[index] + ADAPTRESETREL); index++; continue; } #if IBMTR_DEBUG_MESSAGES printk("ibmtr::find_turbo_adapters, ibmtr card found at" " %x but not a Turbo model\n",ram_addr); #endif iounmap(ram_mapped) ; } /* for */ for(i=0; i<IBMTR_MAX_ADAPTERS; i++) { if(!turbo_io[i]) break; for (j=0; j<IBMTR_MAX_ADAPTERS; j++) { if ( iolist[j] && iolist[j] != turbo_io[i]) continue; iolist[j]=turbo_io[i]; break; } } } static void ibmtr_cleanup_card(struct net_device *dev) { if (dev->base_addr) { outb(0,dev->base_addr+ADAPTRESET); schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */ outb(0,dev->base_addr+ADAPTRESETREL); } #ifndef PCMCIA free_irq(dev->irq, dev); release_region(dev->base_addr, IBMTR_IO_EXTENT); { struct tok_info *ti = netdev_priv(dev); iounmap(ti->mmio); iounmap(ti->sram_virt); } #endif } /**************************************************************************** * ibmtr_probe(): Routine specified in the network device structure * to probe for an IBM Token Ring Adapter. Routine outline: * I. Interrogate hardware to determine if an adapter exists * and what the speeds and feeds are * II. Setup data structures to control execution based upon * adapter characteristics. * * We expect ibmtr_probe to be called once for each device entry * which references it. ****************************************************************************/ static int __devinit ibmtr_probe(struct net_device *dev) { int i; int base_addr = dev->base_addr; if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */ return -ENXIO; if (base_addr > 0x1ff) { /* Check a single specified location. */ if (!ibmtr_probe1(dev, base_addr)) return 0; return -ENODEV; } find_turbo_adapters(ibmtr_portlist); for (i = 0; ibmtr_portlist[i]; i++) { int ioaddr = ibmtr_portlist[i]; if (!ibmtr_probe1(dev, ioaddr)) return 0; } return -ENODEV; } int __devinit ibmtr_probe_card(struct net_device *dev) { int err = ibmtr_probe(dev); if (!err) { err = register_netdev(dev); if (err) ibmtr_cleanup_card(dev); } return err; } /*****************************************************************************/ static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr) { unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0; void __iomem * t_mmio = NULL; struct tok_info *ti = netdev_priv(dev); void __iomem *cd_chanid; unsigned char *tchanid, ctemp; #ifndef PCMCIA unsigned char t_irq=0; unsigned long timeout; static int version_printed; #endif DECLARE_MAC_BUF(mac); /* Query the adapter PIO base port which will return * indication of where MMIO was placed. We also have a * coded interrupt number. */ segment = inb(PIOaddr); if (segment < 0x40 || segment > 0xe0) { /* Out of range values so we'll assume non-existent IO device * but this is not necessarily a problem, esp if a turbo * adapter is being used. */ #if IBMTR_DEBUG_MESSAGES DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, " "Hardware Problem?\n",PIOaddr,segment); #endif return -ENODEV; } /* * Compute the linear base address of the MMIO area * as LINUX doesn't care about segments */ t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048); if (!t_mmio) { DPRINTK("Cannot remap mmiobase memory area") ; return -ENODEV ; } intr = segment & 0x03; /* low bits is coded interrupt # */ if (ibmtr_debug_trace & TRC_INIT) DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n" , PIOaddr, (int) segment, t_mmio, (int) intr); /* * Now we will compare expected 'channelid' strings with * what we is there to learn of ISA/MCA or not TR card */ #ifdef PCMCIA iounmap(t_mmio); t_mmio = ti->mmio; /*BMS to get virtual address */ irq = ti->irq; /*BMS to display the irq! */ #endif cd_chanid = (CHANNEL_ID + t_mmio); /* for efficiency */ tchanid = pcchannelid; cardpresent = TR_ISA; /* try ISA */ /* Suboptimize knowing first byte different */ ctemp = readb(cd_chanid) & 0x0f; if (ctemp != *tchanid) { /* NOT ISA card, try MCA */ tchanid = mcchannelid; cardpresent = TR_MCA; if (ctemp != *tchanid) /* Neither ISA nor MCA */ cardpresent = NOTOK; } if (cardpresent != NOTOK) { /* Know presumed type, try rest of ID */ for (i = 2, j = 1; i <= 46; i = i + 2, j++) { if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue; /* match failed, not TR card */ cardpresent = NOTOK; break; } } /* * If we have an ISA board check for the ISA P&P version, * as it has different IRQ settings */ if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e)) cardpresent = TR_ISAPNP; if (cardpresent == NOTOK) { /* "channel_id" did not match, report */ if (!(ibmtr_debug_trace & TRC_INIT)) { #ifndef PCMCIA iounmap(t_mmio); #endif return -ENODEV; } DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n", PIOaddr); DPRINTK("Expected for ISA: "); PrtChanID(pcchannelid, 1); DPRINTK(" found: "); /* BMS Note that this can be misleading, when hardware is flaky, because you are reading it a second time here. So with my flaky hardware, I'll see my- self in this block, with the HW ID matching the ISA ID exactly! */ HWPrtChanID(cd_chanid, 2); DPRINTK("Expected for MCA: "); PrtChanID(mcchannelid, 1); } /* Now, setup some of the pl0 buffers for this driver.. */ /* If called from PCMCIA, it is already set up, so no need to waste the memory, just use the existing structure */ #ifndef PCMCIA ti->mmio = t_mmio; for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) { if (turbo_io[i] != PIOaddr) continue; #if IBMTR_DEBUG_MESSAGES printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n", PIOaddr); #endif ti->turbo = 1; t_irq = turbo_irq[i]; } #endif /* !PCMCIA */ ti->readlog_pending = 0; init_waitqueue_head(&ti->wait_for_reset); /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP * depending which card is inserted. */ #ifndef PCMCIA switch (cardpresent) { case TR_ISA: if (intr == 0) irq = 9; /* irq2 really is irq9 */ if (intr == 1) irq = 3; if (intr == 2) irq = 6; if (intr == 3) irq = 7; ti->adapter_int_enable = PIOaddr + ADAPTINTREL; break; case TR_MCA: if (intr == 0) irq = 9; if (intr == 1) irq = 3; if (intr == 2) irq = 10; if (intr == 3) irq = 11; ti->global_int_enable = 0; ti->adapter_int_enable = 0; ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12; break; case TR_ISAPNP: if (!t_irq) { if (intr == 0) irq = 9; if (intr == 1) irq = 3; if (intr == 2) irq = 10; if (intr == 3) irq = 11; } else irq=t_irq; timeout = jiffies + TR_SPIN_INTERVAL; while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){ if (!time_after(jiffies, timeout)) continue; DPRINTK( "Hardware timeout during initialization.\n"); iounmap(t_mmio); return -ENODEV; } ti->sram_phys = ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12); ti->adapter_int_enable = PIOaddr + ADAPTINTREL; break; } /*end switch (cardpresent) */ #endif /*not PCMCIA */ if (ibmtr_debug_trace & TRC_INIT) { /* just report int */ DPRINTK("irq=%d", irq); printk(", sram_phys=0x%x", ti->sram_phys); if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */ DPRINTK(", ti->mmio=%p", ti->mmio); printk(", segment=%02X", segment); } printk(".\n"); } /* Get hw address of token ring card */ j = 0; for (i = 0; i < 0x18; i = i + 2) { /* technical reference states to do this */ temp = readb(ti->mmio + AIP + i) & 0x0f; ti->hw_address[j] = temp; if (j & 1) dev->dev_addr[(j / 2)] = ti->hw_address[j]+ (ti->hw_address[j - 1] << 4); ++j; } /* get Adapter type: 'F' = Adapter/A, 'E' = 16/4 Adapter II,... */ ti->adapter_type = readb(ti->mmio + AIPADAPTYPE); /* get Data Rate: F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */ ti->data_rate = readb(ti->mmio + AIPDATARATE); /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */ ti->token_release = readb(ti->mmio + AIPEARLYTOKEN); /* How much shared RAM is on adapter ? */ if (ti->turbo) { ti->avail_shared_ram=127; } else { ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */ } /* We need to set or do a bunch of work here based on previous results*/ /* Support paging? What sizes?: F=no, E=16k, D=32k, C=16 & 32k */ ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE); /* Available DHB 4Mb size: F=2048, E=4096, D=4464 */ switch (readb(ti->mmio + AIP4MBDHB)) { case 0xe: ti->dhb_size4mb = 4096; break; case 0xd: ti->dhb_size4mb = 4464; break; default: ti->dhb_size4mb = 2048; break; } /* Available DHB 16Mb size: F=2048, E=4096, D=8192, C=16384, B=17960 */ switch (readb(ti->mmio + AIP16MBDHB)) { case 0xe: ti->dhb_size16mb = 4096; break; case 0xd: ti->dhb_size16mb = 8192; break; case 0xc: ti->dhb_size16mb = 16384; break; case 0xb: ti->dhb_size16mb = 17960; break; default: ti->dhb_size16mb = 2048; break; } /* We must figure out how much shared memory space this adapter * will occupy so that if there are two adapters we can fit both * in. Given a choice, we will limit this adapter to 32K. The * maximum space will will use for two adapters is 64K so if the * adapter we are working on demands 64K (it also doesn't support * paging), then only one adapter can be supported. */ /* * determine how much of total RAM is mapped into PC space */ ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/ 1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4); ti->page_mask = 0; if (ti->turbo) ti->page_mask=0xf0; else if (ti->shared_ram_paging == 0xf); /* No paging in adapter */ else { #ifdef ENABLE_PAGING unsigned char pg_size = 0; /* BMS: page size: PCMCIA, use configuration register; ISAPNP, use LANAIDC config tool from www.ibm.com */ switch (ti->shared_ram_paging) { case 0xf: break; case 0xe: ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0; pg_size = 32; /* 16KB page size */ break; case 0xd: ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0; pg_size = 64; /* 32KB page size */ break; case 0xc: switch (ti->mapped_ram_size) { case 32: ti->page_mask = 0xc0; pg_size = 32; break; case 64: ti->page_mask = 0x80; pg_size = 64; break; } break; default: DPRINTK("Unknown shared ram paging info %01X\n", ti->shared_ram_paging); iounmap(t_mmio); return -ENODEV; break; } /*end switch shared_ram_paging */ if (ibmtr_debug_trace & TRC_INIT) DPRINTK("Shared RAM paging code: %02X, " "mapped RAM size: %dK, shared RAM size: %dK, " "page mask: %02X\n:", ti->shared_ram_paging, ti->mapped_ram_size / 2, ti->avail_shared_ram / 2, ti->page_mask); #endif /*ENABLE_PAGING */ } #ifndef PCMCIA /* finish figuring the shared RAM address */ if (cardpresent == TR_ISA) { static __u32 ram_bndry_mask[] = { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 }; __u32 new_base, rrr_32, chk_base, rbm; rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03; rbm = ram_bndry_mask[rrr_32]; new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */ chk_base = new_base + (ti->mapped_ram_size << 9); if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) { DPRINTK("Shared RAM for this adapter (%05x) exceeds " "driver limit (%05x), adapter not started.\n", chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE); iounmap(t_mmio); return -ENODEV; } else { /* seems cool, record what we have figured out */ ti->sram_base = new_base >> 12; ibmtr_mem_base = chk_base; } } else ti->sram_base = ti->sram_phys >> 12; /* The PCMCIA has already got the interrupt line and the io port, so no chance of anybody else getting it - MLP */ if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) { DPRINTK("Could not grab irq %d. Halting Token Ring driver.\n", irq); iounmap(t_mmio); return -ENODEV; } /*?? Now, allocate some of the PIO PORTs for this driver.. */ /* record PIOaddr range as busy */ if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) { DPRINTK("Could not grab PIO range. Halting driver.\n"); free_irq(dev->irq, dev); iounmap(t_mmio); return -EBUSY; } if (!version_printed++) { printk(version); } #endif /* !PCMCIA */ DPRINTK("%s %s found\n", channel_def[cardpresent - 1], adapter_def(ti->adapter_type)); DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n", irq, PIOaddr, ti->mapped_ram_size / 2); DPRINTK("Hardware address : %s\n", print_mac(mac, dev->dev_addr)); if (ti->page_mask) DPRINTK("Shared RAM paging enabled. " "Page size: %uK Shared Ram size %dK\n", ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2); else DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n", ti->page_mask); /* Calculate the maximum DHB we can use */ /* two cases where avail_shared_ram doesn't equal mapped_ram_size: 1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical) 2. user has configured adapter for less than avail_shared_ram but is not using paging (she should use paging, I believe) */ if (!ti->page_mask) { ti->avail_shared_ram= min(ti->mapped_ram_size,ti->avail_shared_ram); } switch (ti->avail_shared_ram) { case 16: /* 8KB shared RAM */ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048); ti->rbuf_len4 = 1032; ti->rbuf_cnt4=2; ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048); ti->rbuf_len16 = 1032; ti->rbuf_cnt16=2; break; case 32: /* 16KB shared RAM */ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464); ti->rbuf_len4 = 1032; ti->rbuf_cnt4=4; ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096); ti->rbuf_len16 = 1032; /*1024 usable */ ti->rbuf_cnt16=4; break; case 64: /* 32KB shared RAM */ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464); ti->rbuf_len4 = 1032; ti->rbuf_cnt4=6; ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240); ti->rbuf_len16 = 1032; ti->rbuf_cnt16=6; break; case 127: /* 63.5KB shared RAM */ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464); ti->rbuf_len4 = 1032; ti->rbuf_cnt4=6; ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384); ti->rbuf_len16 = 1032; ti->rbuf_cnt16=16; break; case 128: /* 64KB shared RAM */ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464); ti->rbuf_len4 = 1032; ti->rbuf_cnt4=6; ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960); ti->rbuf_len16 = 1032; ti->rbuf_cnt16=16; break; default: ti->dhb_size4mb = 2048; ti->rbuf_len4 = 1032; ti->rbuf_cnt4=2; ti->dhb_size16mb = 2048; ti->rbuf_len16 = 1032; ti->rbuf_cnt16=2; break; } /* this formula is not smart enough for the paging case ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE - ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH - DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB - SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>; */ ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16 - TR_HLEN; ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN; /*BMS assuming 18 bytes of Routing Information (usually works) */ DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n", ti->maxmtu16, ti->maxmtu4); dev->base_addr = PIOaddr; /* set the value for device */ dev->mem_start = ti->sram_base << 12; dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1; trdev_init(dev); return 0; /* Return 0 to indicate we have found a Token Ring card. */ } /*ibmtr_probe1() */ /*****************************************************************************/ /* query the adapter for the size of shared RAM */ /* the function returns the RAM size in units of 512 bytes */ static unsigned char __devinit get_sram_size(struct tok_info *adapt_info) { unsigned char avail_sram_code; static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 }; /* Adapter gives 'F' -- use RRR bits 3,2 'E' -- 8kb 'D' -- 16kb 'C' -- 32kb 'A' -- 64KB 'B' - 64KB less 512 bytes at top (WARNING ... must zero top bytes in INIT */ avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM); if (avail_sram_code) return size_code[avail_sram_code]; else /* for code 'F', must compute size from RRR(3,2) bits */ return 1 << ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4); } /*****************************************************************************/ static int __devinit trdev_init(struct net_device *dev) { struct tok_info *ti = netdev_priv(dev); SET_PAGE(ti->srb_page); ti->open_failure = NO ; dev->open = tok_open; dev->stop = tok_close; dev->hard_start_xmit = tok_send_packet; dev->get_stats = tok_get_stats; dev->set_multicast_list = tok_set_multicast_list; dev->change_mtu = ibmtr_change_mtu; return 0; } /*****************************************************************************/ static int tok_init_card(struct net_device *dev) { struct tok_info *ti; short PIOaddr; unsigned long i; PIOaddr = dev->base_addr; ti = netdev_priv(dev); /* Special processing for first interrupt after reset */ ti->do_tok_int = FIRST_INT; /* Reset adapter */ writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN); outb(0, PIOaddr + ADAPTRESET); schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */ outb(0, PIOaddr + ADAPTRESETREL); #ifdef ENABLE_PAGING if (ti->page_mask) writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN); #endif writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ); return i? 0 : -EAGAIN; } /*****************************************************************************/ static int tok_open(struct net_device *dev) { struct tok_info *ti = netdev_priv(dev); int i; /*the case we were left in a failure state during a previous open */ if (ti->open_failure == YES) { DPRINTK("Last time you were disconnected, how about now?\n"); printk("You can't insert with an ICS connector half-cocked.\n"); } ti->open_status = CLOSED; /* CLOSED or OPEN */ ti->sap_status = CLOSED; /* CLOSED or OPEN */ ti->open_failure = NO; /* NO or YES */ ti->open_mode = MANUAL; /* MANUAL or AUTOMATIC */ ti->sram_phys &= ~1; /* to reverse what we do in tok_close */ /* init the spinlock */ spin_lock_init(&ti->lock); init_timer(&ti->tr_timer); i = tok_init_card(dev); if (i) return i; while (1){ tok_open_adapter((unsigned long) dev); i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ); /* sig catch: estimate opening adapter takes more than .5 sec*/ if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */ if (i==0) break; if (ti->open_status == OPEN && ti->sap_status==OPEN) { netif_start_queue(dev); DPRINTK("Adapter is up and running\n"); return 0; } i=schedule_timeout_interruptible(TR_RETRY_INTERVAL); /* wait 30 seconds */ if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */ } outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/ DPRINTK("TERMINATED via signal\n"); /*BMS useful */ return -EAGAIN; } /*****************************************************************************/ #define COMMAND_OFST 0 #define OPEN_OPTIONS_OFST 8 #define NUM_RCV_BUF_OFST 24 #define RCV_BUF_LEN_OFST 26 #define DHB_LENGTH_OFST 28 #define NUM_DHB_OFST 30 #define DLC_MAX_SAP_OFST 32 #define DLC_MAX_STA_OFST 33 static void tok_open_adapter(unsigned long dev_addr) { struct net_device *dev = (struct net_device *) dev_addr; struct tok_info *ti; int i; ti = netdev_priv(dev); SET_PAGE(ti->init_srb_page); writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD); for (i = 0; i < sizeof(struct dir_open_adapter); i++) writeb(0, ti->init_srb + i); writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST); writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST); if (ti->ring_speed == 16) { writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST); writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST); writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST); } else { writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST); writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST); writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST); } writeb(NUM_DHB, /* always 2 */ ti->init_srb + NUM_DHB_OFST); writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST); writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST); ti->srb = ti->init_srb; /* We use this one in the interrupt handler */ ti->srb_page = ti->init_srb_page; DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n", readb(ti->init_srb + NUM_DHB_OFST), ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)), ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)), ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST))); writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } /*****************************************************************************/ static void open_sap(unsigned char type, struct net_device *dev) { int i; struct tok_info *ti = netdev_priv(dev); SET_PAGE(ti->srb_page); for (i = 0; i < sizeof(struct dlc_open_sap); i++) writeb(0, ti->srb + i); #define MAX_I_FIELD_OFST 14 #define SAP_VALUE_OFST 16 #define SAP_OPTIONS_OFST 17 #define STATION_COUNT_OFST 18 writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST); writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST); writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST); writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST); writeb(type, ti->srb + SAP_VALUE_OFST); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } /*****************************************************************************/ static void tok_set_multicast_list(struct net_device *dev) { struct tok_info *ti = netdev_priv(dev); struct dev_mc_list *mclist; unsigned char address[4]; int i; /*BMS the next line is CRUCIAL or you may be sad when you */ /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/ if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return; address[0] = address[1] = address[2] = address[3] = 0; mclist = dev->mc_list; for (i = 0; i < dev->mc_count; i++) { address[0] |= mclist->dmi_addr[2]; address[1] |= mclist->dmi_addr[3]; address[2] |= mclist->dmi_addr[4]; address[3] |= mclist->dmi_addr[5]; mclist = mclist->next; } SET_PAGE(ti->srb_page); for (i = 0; i < sizeof(struct srb_set_funct_addr); i++) writeb(0, ti->srb + i); #define FUNCT_ADDRESS_OFST 6 writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST); for (i = 0; i < 4; i++) writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); #if TR_VERBOSE DPRINTK("Setting functional address: "); for (i=0;i<4;i++) printk("%02X ", address[i]); printk("\n"); #endif } /*****************************************************************************/ #define STATION_ID_OFST 4 static int tok_send_packet(struct sk_buff *skb, struct net_device *dev) { struct tok_info *ti; unsigned long flags; ti = netdev_priv(dev); netif_stop_queue(dev); /* lock against other CPUs */ spin_lock_irqsave(&(ti->lock), flags); /* Save skb; we'll need it when the adapter asks for the data */ ti->current_skb = skb; SET_PAGE(ti->srb_page); writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST); writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); spin_unlock_irqrestore(&(ti->lock), flags); dev->trans_start = jiffies; return 0; } /*****************************************************************************/ static int tok_close(struct net_device *dev) { struct tok_info *ti = netdev_priv(dev); /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */ /* unloading the module from memory, and then if a timer pops, ouch */ del_timer_sync(&ti->tr_timer); outb(0, dev->base_addr + ADAPTRESET); ti->sram_phys |= 1; ti->open_status = CLOSED; netif_stop_queue(dev); DPRINTK("Adapter is closed.\n"); return 0; } /*****************************************************************************/ #define RETCODE_OFST 2 #define OPEN_ERROR_CODE_OFST 6 #define ASB_ADDRESS_OFST 8 #define SRB_ADDRESS_OFST 10 #define ARB_ADDRESS_OFST 12 #define SSB_ADDRESS_OFST 14 static char *printphase[]= {"Lobe media test","Physical insertion", "Address verification","Roll call poll","Request Parameters"}; static char *printerror[]={"Function failure","Signal loss","Reserved", "Frequency error","Timeout","Ring failure","Ring beaconing", "Duplicate node address", "Parameter request-retry count exceeded","Remove received", "IMPL force received","Duplicate modifier", "No monitor detected","Monitor contention failed for RPL"}; static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page) { if (ti->page_mask) { *page = (index >> 8) & ti->page_mask; index &= ~(ti->page_mask << 8); } return ti->sram_virt + index; } static void dir_open_adapter (struct net_device *dev) { struct tok_info *ti = netdev_priv(dev); unsigned char ret_code; __u16 err; ti->srb = map_address(ti, ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)), &ti->srb_page); ti->ssb = map_address(ti, ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)), &ti->ssb_page); ti->arb = map_address(ti, ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)), &ti->arb_page); ti->asb = map_address(ti, ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)), &ti->asb_page); ti->current_skb = NULL; ret_code = readb(ti->init_srb + RETCODE_OFST); err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST)); if (!ret_code) { ti->open_status = OPEN; /* TR adapter is now available */ if (ti->open_mode == AUTOMATIC) { DPRINTK("Adapter reopened.\n"); } writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD); open_sap(EXTENDED_SAP, dev); return; } ti->open_failure = YES; if (ret_code == 7){ if (err == 0x24) { if (!ti->auto_speedsave) { DPRINTK("Open failed: Adapter speed must match " "ring speed if Automatic Ring Speed Save is " "disabled.\n"); ti->open_action = FAIL; }else DPRINTK("Retrying open to adjust to " "ring speed, "); } else if (err == 0x2d) { DPRINTK("Physical Insertion: No Monitor Detected, "); printk("retrying after %ds delay...\n", TR_RETRY_INTERVAL/HZ); } else if (err == 0x11) { DPRINTK("Lobe Media Function Failure (0x11), "); printk(" retrying after %ds delay...\n", TR_RETRY_INTERVAL/HZ); } else { char **prphase = printphase; char **prerror = printerror; DPRINTK("TR Adapter misc open failure, error code = "); printk("0x%x, Phase: %s, Error: %s\n", err, prphase[err/16 -1], prerror[err%16 -1]); printk(" retrying after %ds delay...\n", TR_RETRY_INTERVAL/HZ); } } else DPRINTK("open failed: ret_code = %02X..., ", ret_code); if (ti->open_action != FAIL) { if (ti->open_mode==AUTOMATIC){ ti->open_action = REOPEN; ibmtr_reset_timer(&(ti->tr_timer), dev); return; } wake_up(&ti->wait_for_reset); return; } DPRINTK("FAILURE, CAPUT\n"); } /******************************************************************************/ static irqreturn_t tok_interrupt(int irq, void *dev_id) { unsigned char status; /* unsigned char status_even ; */ struct tok_info *ti; struct net_device *dev; #ifdef ENABLE_PAGING unsigned char save_srpr; #endif dev = dev_id; #if TR_VERBOSE DPRINTK("Int from tok_driver, dev : %p irq%d\n", dev,irq); #endif ti = netdev_priv(dev); if (ti->sram_phys & 1) return IRQ_NONE; /* PCMCIA card extraction flag */ spin_lock(&(ti->lock)); #ifdef ENABLE_PAGING save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN); #endif /* Disable interrupts till processing is finished */ writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN); /* Reset interrupt for ISA boards */ if (ti->adapter_int_enable) outb(0, ti->adapter_int_enable); else /* used for PCMCIA cards */ outb(0, ti->global_int_enable); if (ti->do_tok_int == FIRST_INT){ initial_tok_int(dev); #ifdef ENABLE_PAGING writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN); #endif spin_unlock(&(ti->lock)); return IRQ_HANDLED; } /* Begin interrupt handler HERE inline to avoid the extra levels of logic and call depth for the original solution. */ status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD); /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */ /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */ /*BMS status,status_even); */ if (status & ADAP_CHK_INT) { int i; void __iomem *check_reason; __u8 check_reason_page = 0; check_reason = map_address(ti, ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)), &check_reason_page); SET_PAGE(check_reason_page); DPRINTK("Adapter check interrupt\n"); DPRINTK("8 reason bytes follow: "); for (i = 0; i < 8; i++, check_reason++) printk("%02X ", (int) readb(check_reason)); printk("\n"); writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD); status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN); DPRINTK("ISRA_EVEN == 0x02%x\n",status); ti->open_status = CLOSED; ti->sap_status = CLOSED; ti->open_mode = AUTOMATIC; netif_carrier_off(dev); netif_stop_queue(dev); ti->open_action = RESTART; outb(0, dev->base_addr + ADAPTRESET); ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/ spin_unlock(&(ti->lock)); return IRQ_HANDLED; } if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) & (TCR_INT | ERR_INT | ACCESS_INT)) { DPRINTK("adapter error: ISRP_EVEN : %02x\n", (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN)); writeb(~(TCR_INT | ERR_INT | ACCESS_INT), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN); status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/ DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); #ifdef ENABLE_PAGING writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN); #endif spin_unlock(&(ti->lock)); return IRQ_HANDLED; } if (status & SRB_RESP_INT) { /* SRB response */ SET_PAGE(ti->srb_page); #if TR_VERBOSE DPRINTK("SRB resp: cmd=%02X rsp=%02X\n", readb(ti->srb), readb(ti->srb + RETCODE_OFST)); #endif switch (readb(ti->srb)) { /* SRB command check */ case XMIT_DIR_FRAME:{ unsigned char xmit_ret_code; xmit_ret_code = readb(ti->srb + RETCODE_OFST); if (xmit_ret_code == 0xff) break; DPRINTK("error on xmit_dir_frame request: %02X\n", xmit_ret_code); if (ti->current_skb) { dev_kfree_skb_irq(ti->current_skb); ti->current_skb = NULL; } /*dev->tbusy = 0;*/ netif_wake_queue(dev); if (ti->readlog_pending) ibmtr_readlog(dev); break; } case XMIT_UI_FRAME:{ unsigned char xmit_ret_code; xmit_ret_code = readb(ti->srb + RETCODE_OFST); if (xmit_ret_code == 0xff) break; DPRINTK("error on xmit_ui_frame request: %02X\n", xmit_ret_code); if (ti->current_skb) { dev_kfree_skb_irq(ti->current_skb); ti->current_skb = NULL; } netif_wake_queue(dev); if (ti->readlog_pending) ibmtr_readlog(dev); break; } case DIR_OPEN_ADAPTER: dir_open_adapter(dev); break; case DLC_OPEN_SAP: if (readb(ti->srb + RETCODE_OFST)) { DPRINTK("open_sap failed: ret_code = %02X, " "retrying\n", (int) readb(ti->srb + RETCODE_OFST)); ti->open_action = REOPEN; ibmtr_reset_timer(&(ti->tr_timer), dev); break; } ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST); ti->sap_status = OPEN;/* TR adapter is now available */ if (ti->open_mode==MANUAL){ wake_up(&ti->wait_for_reset); break; } netif_wake_queue(dev); netif_carrier_on(dev); break; case DIR_INTERRUPT: case DIR_MOD_OPEN_PARAMS: case DIR_SET_GRP_ADDR: case DIR_SET_FUNC_ADDR: case DLC_CLOSE_SAP: if (readb(ti->srb + RETCODE_OFST)) DPRINTK("error on %02X: %02X\n", (int) readb(ti->srb + COMMAND_OFST), (int) readb(ti->srb + RETCODE_OFST)); break; case DIR_READ_LOG: if (readb(ti->srb + RETCODE_OFST)){ DPRINTK("error on dir_read_log: %02X\n", (int) readb(ti->srb + RETCODE_OFST)); netif_wake_queue(dev); break; } #if IBMTR_DEBUG_MESSAGES #define LINE_ERRORS_OFST 0 #define INTERNAL_ERRORS_OFST 1 #define BURST_ERRORS_OFST 2 #define AC_ERRORS_OFST 3 #define ABORT_DELIMITERS_OFST 4 #define LOST_FRAMES_OFST 6 #define RECV_CONGEST_COUNT_OFST 7 #define FRAME_COPIED_ERRORS_OFST 8 #define FREQUENCY_ERRORS_OFST 9 #define TOKEN_ERRORS_OFST 10 DPRINTK("Line errors %02X, Internal errors %02X, " "Burst errors %02X\n" "A/C errors %02X, " "Abort delimiters %02X, Lost frames %02X\n" "Receive congestion count %02X, " "Frame copied errors %02X\nFrequency errors %02X, " "Token errors %02X\n", (int) readb(ti->srb + LINE_ERRORS_OFST), (int) readb(ti->srb + INTERNAL_ERRORS_OFST), (int) readb(ti->srb + BURST_ERRORS_OFST), (int) readb(ti->srb + AC_ERRORS_OFST), (int) readb(ti->srb + ABORT_DELIMITERS_OFST), (int) readb(ti->srb + LOST_FRAMES_OFST), (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST), (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST), (int) readb(ti->srb + FREQUENCY_ERRORS_OFST), (int) readb(ti->srb + TOKEN_ERRORS_OFST)); #endif netif_wake_queue(dev); break; default: DPRINTK("Unknown command %02X encountered\n", (int) readb(ti->srb)); } /* end switch SRB command check */ writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD); } /* if SRB response */ if (status & ASB_FREE_INT) { /* ASB response */ SET_PAGE(ti->asb_page); #if TR_VERBOSE DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb)); #endif switch (readb(ti->asb)) { /* ASB command check */ case REC_DATA: case XMIT_UI_FRAME: case XMIT_DIR_FRAME: break; default: DPRINTK("unknown command in asb %02X\n", (int) readb(ti->asb)); } /* switch ASB command check */ if (readb(ti->asb + 2) != 0xff) /* checks ret_code */ DPRINTK("ASB error %02X in cmd %02X\n", (int) readb(ti->asb + 2), (int) readb(ti->asb)); writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD); } /* if ASB response */ #define STATUS_OFST 6 #define NETW_STATUS_OFST 6 if (status & ARB_CMD_INT) { /* ARB response */ SET_PAGE(ti->arb_page); #if TR_VERBOSE DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb)); #endif switch (readb(ti->arb)) { /* ARB command check */ case DLC_STATUS: DPRINTK("DLC_STATUS new status: %02X on station %02X\n", ntohs(readw(ti->arb + STATUS_OFST)), ntohs(readw(ti->arb+ STATION_ID_OFST))); break; case REC_DATA: tr_rx(dev); break; case RING_STAT_CHANGE:{ unsigned short ring_status; ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST)); if (ibmtr_debug_trace & TRC_INIT) DPRINTK("Ring Status Change...(0x%x)\n", ring_status); if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){ netif_stop_queue(dev); netif_carrier_off(dev); DPRINTK("Remove received, or Auto-removal error" ", or Lobe fault\n"); DPRINTK("We'll try to reopen the closed adapter" " after a %d second delay.\n", TR_RETRY_INTERVAL/HZ); /*I was confused: I saw the TR reopening but */ /*forgot:with an RJ45 in an RJ45/ICS adapter */ /*but adapter not in the ring, the TR will */ /* open, and then soon close and come here. */ ti->open_mode = AUTOMATIC; ti->open_status = CLOSED; /*12/2000 BMS*/ ti->open_action = REOPEN; ibmtr_reset_timer(&(ti->tr_timer), dev); } else if (ring_status & LOG_OVERFLOW) { if(netif_queue_stopped(dev)) ti->readlog_pending = 1; else ibmtr_readlog(dev); } break; } case XMIT_DATA_REQ: tr_tx(dev); break; default: DPRINTK("Unknown command %02X in arb\n", (int) readb(ti->arb)); break; } /* switch ARB command check */ writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD); writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } /* if ARB response */ if (status & SSB_RESP_INT) { /* SSB response */ unsigned char retcode; SET_PAGE(ti->ssb_page); #if TR_VERBOSE DPRINTK("SSB resp: cmd=%02X rsp=%02X\n", readb(ti->ssb), readb(ti->ssb + 2)); #endif switch (readb(ti->ssb)) { /* SSB command check */ case XMIT_DIR_FRAME: case XMIT_UI_FRAME: retcode = readb(ti->ssb + 2); if (retcode && (retcode != 0x22))/* checks ret_code */ DPRINTK("xmit ret_code: %02X xmit error code: " "%02X\n", (int)retcode, (int)readb(ti->ssb + 6)); else ti->tr_stats.tx_packets++; break; case XMIT_XID_CMD: DPRINTK("xmit xid ret_code: %02X\n", (int) readb(ti->ssb + 2)); default: DPRINTK("Unknown command %02X in ssb\n", (int) readb(ti->ssb)); } /* SSB command check */ writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD); writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); } /* if SSB response */ #ifdef ENABLE_PAGING writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN); #endif writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); spin_unlock(&(ti->lock)); return IRQ_HANDLED; } /*tok_interrupt */ /*****************************************************************************/ #define INIT_STATUS_OFST 1 #define INIT_STATUS_2_OFST 2 #define ENCODED_ADDRESS_OFST 8 static void initial_tok_int(struct net_device *dev) { __u32 encoded_addr, hw_encoded_addr; struct tok_info *ti; unsigned char init_status; /*BMS 12/2000*/ ti = netdev_priv(dev); ti->do_tok_int = NOT_FIRST; /* we assign the shared-ram address for ISA devices */ writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN); #ifndef PCMCIA ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram); #endif ti->init_srb = map_address(ti, ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)), &ti->init_srb_page); if (ti->page_mask && ti->avail_shared_ram == 127) { void __iomem *last_512; __u8 last_512_page=0; int i; last_512 = map_address(ti, 0xfe00, &last_512_page); /* initialize high section of ram (if necessary) */ SET_PAGE(last_512_page); for (i = 0; i < 512; i++) writeb(0, last_512 + i); } SET_PAGE(ti->init_srb_page); #if TR_VERBOSE { int i; DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page); DPRINTK("init_srb(%p):", ti->init_srb ); for (i = 0; i < 20; i++) printk("%02X ", (int) readb(ti->init_srb + i)); printk("\n"); } #endif hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST); encoded_addr = ntohs(hw_encoded_addr); init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/ readb(ti->init_srb+offsetof(struct srb_init_response,init_status)); /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/ ti->ring_speed = init_status & 0x01 ? 16 : 4; DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n", ti->ring_speed, (unsigned int)dev->mem_start); ti->auto_speedsave = (readb(ti->init_srb+INIT_STATUS_2_OFST) & 4) != 0; if (ti->open_mode == MANUAL) wake_up(&ti->wait_for_reset); else tok_open_adapter((unsigned long)dev); } /*initial_tok_int() */ /*****************************************************************************/ #define CMD_CORRELATE_OFST 1 #define DHB_ADDRESS_OFST 6 #define FRAME_LENGTH_OFST 6 #define HEADER_LENGTH_OFST 8 #define RSAP_VALUE_OFST 9 static void tr_tx(struct net_device *dev) { struct tok_info *ti = netdev_priv(dev); struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data; unsigned int hdr_len; __u32 dhb=0,dhb_base; void __iomem *dhbuf = NULL; unsigned char xmit_command; int i,dhb_len=0x4000,src_len,src_offset; struct trllc *llc; struct srb_xmit xsrb; __u8 dhb_page = 0; __u8 llc_ssap; SET_PAGE(ti->asb_page); if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n"); /* in providing the transmit interrupts, is telling us it is ready for data and providing a shared memory address for us to stuff with data. Here we compute the effective address where we will place data. */ SET_PAGE(ti->arb_page); dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST)); if (ti->page_mask) { dhb_page = (dhb_base >> 8) & ti->page_mask; dhb=dhb_base & ~(ti->page_mask << 8); } dhbuf = ti->sram_virt + dhb; /* Figure out the size of the 802.5 header */ if (!(trhdr->saddr[0] & 0x80)) /* RIF present? */ hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN; else hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8) + sizeof(struct trh_hdr) - TR_MAXRIFLEN; llc = (struct trllc *) (ti->current_skb->data + hdr_len); llc_ssap = llc->ssap; SET_PAGE(ti->srb_page); memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb)); SET_PAGE(ti->asb_page); xmit_command = xsrb.command; writeb(xmit_command, ti->asb + COMMAND_OFST); writew(xsrb.station_id, ti->asb + STATION_ID_OFST); writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST); writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST); writeb(0, ti->asb + RETCODE_OFST); if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) { writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST); writeb(0x0e, ti->asb + HEADER_LENGTH_OFST); SET_PAGE(dhb_page); writeb(AC, dhbuf); writeb(LLC_FRAME, dhbuf + 1); for (i = 0; i < TR_ALEN; i++) writeb((int) 0x0FF, dhbuf + i + 2); for (i = 0; i < TR_ALEN; i++) writeb(0, dhbuf + i + TR_ALEN + 2); writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); return; } /* * the token ring packet is copied from sk_buff to the adapter * buffer identified in the command data received with the interrupt. */ writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST); writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST); src_len=ti->current_skb->len; src_offset=0; dhb=dhb_base; while(1) { if (ti->page_mask) { dhb_page=(dhb >> 8) & ti->page_mask; dhb=dhb & ~(ti->page_mask << 8); dhb_len=0x4000-dhb; /* remaining size of this page */ } dhbuf = ti->sram_virt + dhb; SET_PAGE(dhb_page); if (src_len > dhb_len) { memcpy_toio(dhbuf,&ti->current_skb->data[src_offset], dhb_len); src_len -= dhb_len; src_offset += dhb_len; dhb_base+=dhb_len; dhb=dhb_base; continue; } memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len); break; } writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); ti->tr_stats.tx_bytes += ti->current_skb->len; dev_kfree_skb_irq(ti->current_skb); ti->current_skb = NULL; netif_wake_queue(dev); if (ti->readlog_pending) ibmtr_readlog(dev); } /*tr_tx */ /*****************************************************************************/ #define RECEIVE_BUFFER_OFST 6 #define LAN_HDR_LENGTH_OFST 8 #define DLC_HDR_LENGTH_OFST 9 #define DSAP_OFST 0 #define SSAP_OFST 1 #define LLC_OFST 2 #define PROTID_OFST 3 #define ETHERTYPE_OFST 6 static void tr_rx(struct net_device *dev) { struct tok_info *ti = netdev_priv(dev); __u32 rbuffer; void __iomem *rbuf, *rbufdata, *llc; __u8 rbuffer_page = 0; unsigned char *data; unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length; unsigned char dlc_hdr_len; struct sk_buff *skb; unsigned int skb_size = 0; int IPv4_p = 0; unsigned int chksum = 0; struct iphdr *iph; struct arb_rec_req rarb; SET_PAGE(ti->arb_page); memcpy_fromio(&rarb, ti->arb, sizeof(rarb)); rbuffer = ntohs(rarb.rec_buf_addr) ; rbuf = map_address(ti, rbuffer, &rbuffer_page); SET_PAGE(ti->asb_page); if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n"); writeb(REC_DATA, ti->asb + COMMAND_OFST); writew(rarb.station_id, ti->asb + STATION_ID_OFST); writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST); lan_hdr_len = rarb.lan_hdr_len; if (lan_hdr_len > sizeof(struct trh_hdr)) { DPRINTK("Linux cannot handle greater than 18 bytes RIF\n"); return; } /*BMS I added this above just to be very safe */ dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST); hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr); SET_PAGE(rbuffer_page); llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len; #if TR_VERBOSE DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n", (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len); DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n", llc, ntohs(rarb.rec_buf_addr), dev->mem_start); DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, " "ethertype: %04X\n", (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST), (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST), (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2), (int) ntohs(readw(llc + ETHERTYPE_OFST))); #endif if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) { SET_PAGE(ti->asb_page); writeb(DATA_LOST, ti->asb + RETCODE_OFST); ti->tr_stats.rx_dropped++; writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); return; } length = ntohs(rarb.frame_len); if (readb(llc + DSAP_OFST) == EXTENDED_SAP && readb(llc + SSAP_OFST) == EXTENDED_SAP && length >= hdr_len) IPv4_p = 1; #if TR_VERBOSE #define SADDR_OFST 8 #define DADDR_OFST 2 if (!IPv4_p) { void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data); u8 saddr[6]; u8 daddr[6]; DECLARE_MAC_BUF(mac); DECLARE_MAC_BUF(mac2); int i; for (i = 0 ; i < 6 ; i++) saddr[i] = readb(trhhdr + SADDR_OFST + i); for (i = 0 ; i < 6 ; i++) daddr[i] = readb(trhhdr + DADDR_OFST + i); DPRINTK("Probably non-IP frame received.\n"); DPRINTK("ssap: %02X dsap: %02X " "saddr: %s daddr: %$s\n", readb(llc + SSAP_OFST), readb(llc + DSAP_OFST), print_mac(mac, saddr), print_mac(mac2, daddr)); } #endif /*BMS handle the case she comes in with few hops but leaves with many */ skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc); if (!(skb = dev_alloc_skb(skb_size))) { DPRINTK("out of memory. frame dropped.\n"); ti->tr_stats.rx_dropped++; SET_PAGE(ti->asb_page); writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code)); writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); return; } /*BMS again, if she comes in with few but leaves with many */ skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len); skb_put(skb, length); data = skb->data; rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len))); rbufdata = rbuf + offsetof(struct rec_buf, data); if (IPv4_p) { /* Copy the headers without checksumming */ memcpy_fromio(data, rbufdata, hdr_len); /* Watch for padded packets and bogons */ iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc)); ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr); length -= hdr_len; if ((ip_len <= length) && (ip_len > 7)) length = ip_len; data += hdr_len; rbuffer_len -= hdr_len; rbufdata += hdr_len; } /* Copy the payload... */ #define BUFFER_POINTER_OFST 2 #define BUFFER_LENGTH_OFST 6 for (;;) { if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len) DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n", length,rbuffer_len); if (IPv4_p) chksum=csum_partial_copy_nocheck((void*)rbufdata, data,length<rbuffer_len?length:rbuffer_len,chksum); else memcpy_fromio(data, rbufdata, rbuffer_len); rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ; if (!rbuffer) break; rbuffer -= 2; length -= rbuffer_len; data += rbuffer_len; rbuf = map_address(ti, rbuffer, &rbuffer_page); SET_PAGE(rbuffer_page); rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST)); rbufdata = rbuf + offsetof(struct rec_buf, data); } SET_PAGE(ti->asb_page); writeb(0, ti->asb + offsetof(struct asb_rec, ret_code)); writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); ti->tr_stats.rx_bytes += skb->len; ti->tr_stats.rx_packets++; skb->protocol = tr_type_trans(skb, dev); if (IPv4_p) { skb->csum = chksum; skb->ip_summed = CHECKSUM_COMPLETE; } netif_rx(skb); dev->last_rx = jiffies; } /*tr_rx */ /*****************************************************************************/ static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev) { tmr->expires = jiffies + TR_RETRY_INTERVAL; tmr->data = (unsigned long) dev; tmr->function = tok_rerun; init_timer(tmr); add_timer(tmr); } /*****************************************************************************/ void tok_rerun(unsigned long dev_addr){ struct net_device *dev = (struct net_device *)dev_addr; struct tok_info *ti = netdev_priv(dev); if ( ti->open_action == RESTART){ ti->do_tok_int = FIRST_INT; outb(0, dev->base_addr + ADAPTRESETREL); #ifdef ENABLE_PAGING if (ti->page_mask) writeb(SRPR_ENABLE_PAGING, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN); #endif writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); } else tok_open_adapter(dev_addr); } /*****************************************************************************/ static void ibmtr_readlog(struct net_device *dev) { struct tok_info *ti; ti = netdev_priv(dev); ti->readlog_pending = 0; SET_PAGE(ti->srb_page); writeb(DIR_READ_LOG, ti->srb); writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN); writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD); netif_stop_queue(dev); } /*****************************************************************************/ /* tok_get_stats(): Basically a scaffold routine which will return the address of the tr_statistics structure associated with this device -- the tr.... structure is an ethnet look-alike so at least for this iteration may suffice. */ static struct net_device_stats *tok_get_stats(struct net_device *dev) { struct tok_info *toki; toki = netdev_priv(dev); return (struct net_device_stats *) &toki->tr_stats; } /*****************************************************************************/ static int ibmtr_change_mtu(struct net_device *dev, int mtu) { struct tok_info *ti = netdev_priv(dev); if (ti->ring_speed == 16 && mtu > ti->maxmtu16) return -EINVAL; if (ti->ring_speed == 4 && mtu > ti->maxmtu4) return -EINVAL; dev->mtu = mtu; return 0; } /*****************************************************************************/ #ifdef MODULE /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */ static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS]; static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 }; static int irq[IBMTR_MAX_ADAPTERS]; static int mem[IBMTR_MAX_ADAPTERS]; MODULE_LICENSE("GPL"); module_param_array(io, int, NULL, 0); module_param_array(irq, int, NULL, 0); module_param_array(mem, int, NULL, 0); static int __init ibmtr_init(void) { int i; int count=0; find_turbo_adapters(io); for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) { struct net_device *dev; irq[i] = 0; mem[i] = 0; dev = alloc_trdev(sizeof(struct tok_info)); if (dev == NULL) { if (i == 0) return -ENOMEM; break; } dev->base_addr = io[i]; dev->irq = irq[i]; dev->mem_start = mem[i]; if (ibmtr_probe_card(dev)) { free_netdev(dev); continue; } dev_ibmtr[i] = dev; count++; } if (count) return 0; printk("ibmtr: register_netdev() returned non-zero.\n"); return -EIO; } module_init(ibmtr_init); static void __exit ibmtr_cleanup(void) { int i; for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){ if (!dev_ibmtr[i]) continue; unregister_netdev(dev_ibmtr[i]); ibmtr_cleanup_card(dev_ibmtr[i]); free_netdev(dev_ibmtr[i]); } } module_exit(ibmtr_cleanup); #endif